Catalytic effect of Al3Ti on the reversible dehydrogenation of NaAlH4
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Al3Ti was directly utilized as catalyst precursor to examine its catalytic activity in the reversible dehydrogenation of NaAlH4. It was observed that Al3Ti possessed considerable catalytic effect on the de-/hydriding reactions of NaAlH4. The catalytic enhancement by Al3Ti doping significantly increased with increasing ball-milling time. Moreover, it was noted that dehydriding kinetics and cycling performance of the Al3Ti-doped NaAlH4 were highly dependent on the starting material, 1:1 NaH/Al mixture or NaAlH4. The combined property and phase examinations suggest that Al3Ti may act as active species to catalyze the reversible de-/hydrogenation of NaAlH4. (c) 2006 Published by Elsevier B.V.
Journal of Alloys and Compounds
Physical Chemistry of Materials
Solid State Chemistry